im in free trial, but i want to change to starter package rather than gold/business before billing begins and before I add domain name

The homestead staff will take care of your request during business hours. I agree, a point and click would be helpful for selecting options. I've noticed that many companies don't want to give the customer the power to reduce services to lessen charges. Comcast is the same way. There is some processing involved and they need to have a rep handle it.
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I have changed it for you.